Semi-airborne electromagnetic exploration for deep earth resources - large 
scale multi source 3D imaging of a graphite deposit

Mörbe, W.; Yogeshwar, P.; Tezkan, B.; Kotowski, P.; Thiede, A.; Steuer, A.; Rochlitz, R.; Günther, T.; Brauch, K.; Becken, M.

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Conference Paper

Semi-airborne electromagnetic exploration for deep earth resources - large scale multi source 3D imaging of a graphite deposit

Authors

Mörbe, W.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Yogeshwar, P.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Tezkan, B.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Kotowski, P.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Thiede, A.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Steuer, A.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Rochlitz, R.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Günther, T.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Brauch, K.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

Becken, M.
30. Kolloquium, 2023, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;

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https://gfzpublic.gfz-potsdam.de/pubman/item/item_5026039
(Supplementary material)

Fulltext (public)

EMTF_2023_St_Marienthal_14_Moerbe.pdf
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Citation

Mörbe, W., Yogeshwar, P., Tezkan, B., Kotowski, P., Thiede, A., Steuer, A., Rochlitz, R., Günther, T., Brauch, K., Becken, M. (2024): Semi-airborne electromagnetic exploration for deep earth resources - large scale multi source 3D imaging of a graphite deposit. - In: Börner, J., Yogeshwar, P. (Eds.), - Protokoll über das 30. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung: St. Marienthal, 25. September - 29. September 2023, 30. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung (St. Marienthal 2023), 32-32, 1 p.

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5026107

Abstract

The transition towards renewable energies demands secure supply with critical raw material and requires efficient non-invasive methods for deep earth resources exploration. The novel DESMEX (Deep electromagnetic sounding for mineral exploration) semi-airborne electromagnetic (semi-AEM) exploration concept aims at efficient exploration of resources down to 1 km depth. Here we present a large-scale semi-AEM exploration study in a graphite mining district in eastern Bavaria, Germany. At the ground, several horizontal electrical dipole transmitters were deployed and helicopter-towed magnetic field sensors measure the EM fields along flight lines within several overlapping flight areas, providing a fast data acquisition and a high spatial coverage. Imaged shallow high conductivity structures can be correlated with graphite-rich zones and match well with existing helicopter-borne EM results. The presence of graphite leads to significant induced polarization (IP) effects with considerably high chargeabilities superposing electromagnetic induction. We include these effects in a realistic 3D inversion using a synthetic data study to analyse, if the IP effect alters the overall conductivity structure and demonstrate that the obtained 3D model is reliable.